#include<stdio.h>

int main(){
    int i=0;
	char b[];
	while(1){
       char a=getchar();
	   if(a=='\n') break;
	   b[i]=(a-2-'a')%26+'a';
	   i++;
	   }
	while(i>=0){
	     printf("%c",b[i]);
		 i--;
	}
	printf("\n");
    return 0;
    }
